package com.sky.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.xiaoymin.knife4j.core.util.CollectionUtils;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WebSocketServer webSocketServer;

    /**
     * 用户下单 OrderDetailMapper 订单详情
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional

    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {

        //1.处理业务异常（地址簿为空，购物车数据为空）
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if(addressBook == null){
            //抛出业务异常
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        ShoppingCart shoppingCart = new ShoppingCart();
        //查询当前用户的购物车数据
        Long userId = BaseContext.getCurrentId();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (shoppingCartList == null || shoppingCartList.size() == 0) {
            //抛出业务异常
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //2.向订单表插入1条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(userId);
        orders.setAddress(addressBook.getDetail());
        orderMapper.insert(orders);


        List<OrderDetail> orderDetailList = new ArrayList<>();
        //3.向订单明细表插入n条数据
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();//订单明细
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId());//设置当前订单明细关联的订单id
            orderDetailList.add(orderDetail);
        }
        orderDetailMapper.insertBatch(orderDetailList);
        //4.清空购物车数据
        shoppingCartMapper.deleteByUserId(userId);
        //5.封装VO返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();
        return orderSubmitVO;
    }
    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        /*JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );*/
        JSONObject jsonObject = new JSONObject();

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));
        paySuccess(ordersPaymentDTO.getOrderNumber());

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {
        //当前登录用户id
        Long userId = BaseContext.getCurrentId();
        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumberAndUserId(outTradeNo,userId);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        //通过websocket向客户端浏览器推送消息 type orderId content
        Map map = new HashMap();
        map.put("tyoe",1);  //1表示来单提醒 ，2 表示客户催单
        map.put("orderId",ordersDB.getId());
        map.put("content","订单号：" + outTradeNo);
        String json = JSONObject.toJSONString(map);
        webSocketServer.sendToAllClient(json);


    }

    /**
     * 用户端分页查询用户订单
     * @param pageNum 页码
     * @param pageSize 每页条数
     * @param status 订单状态，1待付款，2待接单，3已接单，4派送中，5已完成，6已取消
     * @return
     */
    public PageResult pageQuery4User(int pageNum, int pageSize, Integer status) {
        //设置分页
        PageHelper.startPage(pageNum, pageSize);

        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);

        //分页条件查询
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrderVO> list = new ArrayList<>();

        //查询出订单详细，并封装到OrderVO进行响应
        if (page != null && page.getTotal()>0) {
            for (Orders orders : page) {
                Long orderId = orders.getId();
                //查询订单详细
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetails);
                list.add(orderVO);
            }

        }
        return new PageResult(page.getTotal(), list);
    }

    /**
     * 根据订单id查询订单详情
     * @param id
     * @return
     */
    public OrderVO details(Long id) {
        //根据id查询订单
        Orders orders = orderMapper.getById(id);

        //查询该订单对应菜品/套餐的明细
        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orders.getId());

        //将该订单及其详情封装到OrderVO并返回
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetails);
        return orderVO;
    }

    /**
     * 取消订单
     * @param id
     */
    public void cancel(Long id) throws Exception {
        //根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        //校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //判断订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        //订单如果处于待接单状态下取消，需要进行退款
        if(ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            //调用微信支付退款接口
            weChatPayUtil.refund(
                    ordersDB.getNumber(),//商户订单号
                    ordersDB.getNumber(),//商户退款订单号
                    new BigDecimal(0.01),//退款金额 单位 元
                    new BigDecimal(0.01)//原订单金额
            );
            //修改支付状态为 已退款
            orders.setPayStatus(Orders.REFUND);
        }
        //更新订单状态，取消原因，取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);

    }

    /**
     * 重复下单
     * @param id
     */
    public void repetition(Long id) {
        //查询当前用户信息
        Long userId = BaseContext.getCurrentId();
        //根据id查询当前订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        //将订单详情转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x ->{
            ShoppingCart shoppingCart = new ShoppingCart();
            BeanUtils.copyProperties(x,shoppingCart,"id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());
            return shoppingCart;
        }).collect(Collectors.toList());

        //将购物车对象添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 订单搜索
     * @param orderPageQueryDTO
     * @return
     */
    public PageResult conditionSearch(OrdersPageQueryDTO orderPageQueryDTO) {
        PageHelper.startPage(orderPageQueryDTO.getPage(),orderPageQueryDTO.getPageSize());
        Page<Orders> page = orderMapper.pageQuery(orderPageQueryDTO);

        //部分订单状态，需要额外返回订单菜品信息，将Orders转换为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);
        return new PageResult(page.getTotal(),orderVOList);
    }

    /**
     * 各个状态的订单数量统计
     * @return
     */
    public OrderStatisticsVO statistics() {
        //根据状态分别查询出待接单，带派送，派送中的订单数量
        Integer toBeConfirmed = orderMapper.countByStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countByStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countByStatus(Orders.DELIVERY_IN_PROGRESS);
        //将查询出的数据封装到orderStatisticsVO中
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    /**
     * 接单
     * @param ordersConfirmDTO
     */
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
       Orders orders = Orders.builder()
               .id(ordersConfirmDTO.getId())
               .status(Orders.CONFIRMED)
               .build();
       orderMapper.update(orders);
    }

    /**
     * 拒单
     * @param ordersRejectionDTO
     * @throws Exception
     */
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
        //根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());
        //判断订单是否存在并且状态是否为2（待接单）
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR +"或"+ MessageConstant.ORDER_NOT_FOUND);
        }
        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus.equals(Orders.PAID)){
            //用户已支付，需要退款
            String refund = weChatPayUtil.refund(
                    ordersDB.getNumber(),
                    ordersDB.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01)
            );
            log.info("申请退款：{}",refund);

        }
        //退款，根据订单id更新订单状态，拒单原因，取消时间
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);



    }

    /**
     * 取消订单
     * @param ordersCancelDTO
     * @throws Exception
     */
    public void cancel(OrdersCancelDTO ordersCancelDTO) throws Exception {
        //根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());
        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus.equals(Orders.PAID)){
            //用户已支付，需要退款
            String refund = weChatPayUtil.refund(
                    ordersDB.getNumber(),
                    ordersDB.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01)
            );
            log.info("申请退款：{}",refund);
            // 管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
            Orders orders = new Orders();
            orders.setId(ordersDB.getId());
            orders.setStatus(Orders.CANCELLED);
            orders.setCancelReason(ordersCancelDTO.getCancelReason());
            orders.setCancelTime(LocalDateTime.now());
            orderMapper.update(orders);
        }

    }

    /**
     * 派送订单
     * @param id
     * @throws Exception
     */
    public void delivery(Long id)  {
        //根据id查询订单
        Orders ordersDB = orderMapper.getById(id);
        //判断订单状态是否为带派送
        if(!ordersDB.getStatus().equals(Orders.CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //更新订单状态
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.DELIVERY_IN_PROGRESS)
                .build();
        orderMapper.update(orders);
    }

    /**
     * 完成订单
     * @param id
     */
    public void complete(Long id) {
        //根据id查询订单
        Orders ordersDB = orderMapper.getById(id);
        //判断订单状态是否为带派送
        if(!ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)||ordersDB==null){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //更新订单状态
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.COMPLETED)
                .deliveryTime(LocalDateTime.now())
                .build();
        orderMapper.update(orders);
    }

    /**
     * 催单
     * @param id
     */
    public void reminder(Long id) {
        Orders ordersDB = orderMapper.getById(id);
        //订单是否存在
        if(ordersDB ==null){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Map map = new HashMap();
        map.put("type",2); //2表示催单
        map.put("orderId",id);
        map.put("content","订单号"+ ordersDB.getNumber());
        String json = JSONObject.toJSONString(map);
        webSocketServer.sendToAllClient(json);

    }

    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();
        List<Orders> ordersList =page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                String orderDishes = getOrderDishesStr(orders);
                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;

    }
    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }


}
